L.B. White GUARDIAN Smart Sense AD250 Instruction manual

WORLD PROVIDER - INNOVATIVE HEATING SOLUTIONS
411 Mason Street, Onalaska,WI 54650 • 800-345-7200 • 608-783-5691 • 608-783-6115 (fax) • www.lbwhite.com
Outdoor Mount Kit
AD250 & AW250
Part Number 24097
View these instructions online at www.lbwhite.com
Kit Contents: Tools required:
Standard screwdriver
Electric Drill
1/4 in. Drill Bit
Ratchet with 9/16 in. Socket or 9/16 in. Wrench
Reciprocating Saw
1/4 in. Nut Driver
Level
Materials required:
Qty. 4 - 12 Penny Nails
DESCRIPTION QTY. PART NUMBER
Instructions 1 30753
Outdoor Top 1 20257
Wall Bracket, Burner End 1 24054
Wall Bracket, Motor End 1 24053
DuctAssembly 1 24472
Duct Trim 2 24073
Duct Bracket 2 20092
Heater Duct Flange 1 24072
Hardware Bag 1 24075
Template 1 30754
ASSEMBLY and INSTALLATION INSTRUCTIONS
Qualifications for installation of the kit:
• You must be able to read and understand all instructions provided with the kit.
• You must have sufficient experience to install the kit.
• You must be able to test the heater for proper operation and place the heater in a continuing safe
and normal operating condition.
1. Remove the six blower outlet screws. See Fig. 1.
FIG. 1
Section A: Assembling Kit Components to Heater

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Outdoor Installation Kit • AD250 & AW250
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2. Apply a bead of provided sealant around back of duct flange. See Fig. 2.
FIG. 2
3. Attach the heater duct flange to outlet of heater using the blower outlet screws.
Ensure wide margin of flange is at top. See Fig. 3.
FIG. 3
4. Use two #8 x 1/2 in. self -drilling screws from kit at holes on upper margin of flange. See Fig. 4.
FIG. 4

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5. Apply a heavy bead of sealant all the way around the inside corner of the mounting flange. See Fig. 5.
FIG. 5
6. Position duct into mounting flange so dampers lift up and away from blower outlet. Push duct firmly
against flange.Attach duct to flange using 3/8 in. sheet metal screws at flange sides. See Figs. 6 and 7.
FIG. 6
FIG. 7
Inside Corner
Dampers
Flange
Screws
(2 per side)

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7. Remove the four cage nuts from corners of heater’s case top. Install hole plugs. Press the plugs firmly to
lock into hole. See Figs. 8 and 9.
FIG. 8
FIG. 9
8. Fold the four tabs of the outdoor top to its underside center. See Fig. 10.

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FIG. 10
9. Center the top onto heater. Top slopes away from duct side of heater. Secure top to heater with eight,
#8 x 1/2 in. self-drilling screws, (four at front, four at back). See Fig. 11.
FIG. 11
Underside
of top
Tabs folded to
center
Secure at
holes

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Section B: Preparing the Building for Heater Installation
Section C: Mounting the Heater and Completion
1. Unfold the template provided in the kit.
2. Use the template for determining the proper location of the heater with its mounting brackets,
and for cutting out the hole needed for the ducting.
3. Read and comply with all installation instructions and information given on the template.
1. After the duct hole has been cut, and stud locations identified, center the wall brackets at
marks made on studs. Position the brackets so the holed mounting flanges are pointing in
opposite directions. See Fig. 12. Temporarily attach the brackets with nails at upper holes.
See Fig. 13.
FIG. 12
FIG. 13
Centered
at studs
Flanges
pointed in
opposite
directions
Nail holes

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2. Ensure brackets are level and plumb. Stabilize with nails at lower holes. See Fig. 13. Drill pilot
holes at upper and lower main support holes. Secure brackets to building with 3/8 in. x 4 in. lag
screws and washers. Tighten screws. Check with a level. See Fig. 14.
FIG. 14
3. Lift the heater onto the bracket assembly, and slide the duct assembly through the wall opening.
4. Position the heater so duct is flush with inner wall of building and holes in base align to holes in
brackets.
5. Insert spacers between the openings in heater base and holes in brackets. Base holes to be used
vary depending on center to center of building studs. Secure heater to brackets using 1 3/4 in. bolts,
washers and lock nuts. See Figs. 15 and 16.
FIG. 15
BURNER END
MOTOR END
BLOWER OUTLET SIDE OF HEATER
16" ON CENTER
24" ON CENTER
Main support
holes Lag screw
with washer
16 in. (40.6cm)
24 in. (61cm)
HEATERBASE

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FIG. 16
3/8 NUT
3/8 WASHER
SPACER
BOLT 3/8 X 1 3/4
6. Ensure heater clearances are as shown in Fig. 17.
FIG. 17 6 IN. MINIMUM
WALL
TRIM PIECES
DUCT
24 IN. MINIMUM
GROUND
7. Fill in void around duct with non-combustible insulation.
8. Seal the edges of duct hole at interior and exterior of building. Use waterproof caulk. If desired, install
trim pieces. Fold the duct trim frames around the duct assembly at both sides of wall.Attach with 3/4
in. sheet metal screws. See schematic on following page.
(15.2cm)
(61cm)

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9. Connect the heater to its gas and electrical supplies. Check for gas leaks.
10. Start the heater. Test the installation. Dampers must open and close completely when heater is started
and stopped.
11. Refer to schematic for a general view of the kit assembly and for all part numbers. Keep these instruc-
tions for future use.

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Schematic and Parts List: